Brace



(No' Mo del.)

J. W. JOHNSON.

BEACH.

No. 303,(343. Patented Aug. 19, 1884.

WITNESSES: I VENTOR. I %lam (Bi UNITED STATES PATENT Orrca JAMESVVILLIAM JOHNSON, OF OTTA\VA, KANSAS. i

BRAC E.

SPECIFICATION forming part of Letters Patent No. 303,(543, dated August19, 1884.

Application filed January 9, 1884.

To all whom it may concern:

Be itknown that I, JAMES WV. JOHNSON, a citizen of the United States,and a resident of Ottawa, in the eounty of Franklin and State of Kansas,have'invented certain new and useful mprovements in Braees; and I dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it ap pertains to make and use the same, reference beinghad to the accompanying drawings, which form a part of thisspecification, and in which- Figure 1 is a side View of my improvedbrace. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is across-seetional View taken on line x w, Fig. l. Fig. et is a detail Viewof the lever or eccentrie by which the clamping-jaws are locked in theirclosed posi tion, and Fig. 5 is a similar view of the clamping-jaws.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention rclates to that class of braces or bit stoeks in which apivoted eccentric provided with a suitable handle is adapted to lock theanger or drill which is being used in its operative position in thebrace; and it consists in the improved Construction and combination ofparts of a brace of the above-mentioned class, as will be hereinaftermore full y described and claimed. v

In the aocompanying drawings, A repre sents the main portion or body ofthe brace, which is provided with a longitudinal recess, A whichdiminishes in width as it enters into the body A.

In one side of the wall of the recess A', and conmunicating with thesame, is a second and smaller reeess, A for the purpose hereinafterspecified. One side of the body A is provided with a slot, B,communicating with the longitudinal recess A the said slot beingpreierably made on that side of the body A which is opposite to the sidein which the smaller recess A is cut. XVithin this slot is pivotallysecured the eceentrie B, which is provided with a suitable handle, B',which lies close against the side of the brace when the drill or othertool is locked in its operative position within the same. i

C indicates the removable elamping-jaws, which are shown in detail inFig. 5` of the drawings, the said jaws being suitabl'y recessed` upontheir inner sides or faces at c for (No model.)

the reception of the npper end of the drill or other tool which it isdesired to enploy. These jaws are hin ged together at their npper endsat G', one o fthem-the larger or thickerbeing provided with a lug orprojection, G", adapted to fit within the smaller' recess A" while theother jaw is beveled or cut away upon its outer side.

To operate my improved brace, the handle B' of the eccentric B is thrownout into the position shown in dotted lines in Fig. 2 of the drawings,when the thimer clamping -j aw can be swung into its open position andthe upper end of the tool readily inserted, when by pressing the handleof the eccentric back into its closed position the tool will be firmlylocked within the brace, the lug or projeetion C on the thickerclamping-jaw serving to prevent the jaws from being forced out by thelookingeccentric or from being pulled out by the tool. The npper end ofthe body of the brace is provided with a suitable screw-threadedapertnre, D, which admits of the brace being readily attached to anyordinary bracestock or drillstock.

From the forcgoing description, taken in connection with theaccompanying drawings, the Construction and operation of my im provedbrace will readily be understood without requiring further xplanation.

It will be seen that my improved brace is simple in Construction, and istherefore not liable to break or get out of order, while by construetingthe clampingjaws in the manner described they can, when worn throughuse, be readily removed and a new pair substituted, as will readily beunderstood.

Having thus described myinvention, I claim and desire to secure byLet-ters Patent of the United States- As an improvement in braees, thecombination of the bracebody A, provided with a screw-t-hrcadedaperture, D, longitudinal recess A', smaller reoess A, and slot B,eccentric B, having an operatinghandle, B', and hinged clamping-'aws G,one of which is pro vided with a lug` or projection, C", all constructedand arranged to operate substantiall y in the manner and for the purposeshown and described.

JAMES XVILLIAM J OHNSON.

XVit'nesses:

GEO. D. STINEBAUGH, J C. BARRICKMAN.

